David Harbour leads the market at 67.5% implied probability as the frontrunner for Outstanding Supporting Actor in a Limited or Anthology Series or Movie, driven by his standout performance and creative risks in the critically praised HBO miniseries DTF St. Louis, which earned 13 Emmy nominations overall. The show's ensemble strength, including fellow nominees Jason Bateman and Richard Jenkins, has consolidated trader sentiment around Harbour following positive reviews and precursor buzz like his Gotham TV recognition. Charles Melton sits at 24.4% as a credible challenger on the strength of his work in Netflix's Beef, while lower probabilities for Richard Gadd, Nick Offerman, and others reflect more limited campaign momentum and fewer supporting signals from guild or critics' circles. Upcoming Creative Arts Emmys in early September remain the key near-term catalyst.